ASTM E1347-06

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Designation:E1347–06
Standard Test Method for
Color and Color-Difference Measurement by Tristimulus
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Colorimetry
This standard is issued under the fixed designation E1347; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.7 This test method does not apply to the use of a
spectrocolorimeter, which is a spectrometer that provides
1.1 This test method covers the instrumental measurement
colorimetric data, but not the underlying spectral data. Mea-
ofspecimensresultingincolorcoordinatesandcolordifference
surement by using a spectrocolorimeter is covered in Practice
values by using a tristimulus colorimeter, also known as a
E1164 and methods on color measurement by spectrophotom-
tristimulus filter colorimeter or a color-difference meter.
etry.
1.2 Provision is made in this test method for the measure-
1.8 This standard does not purport to address all of the
ment of color coordinates and color differences by reflected or
safety concerns, if any, associated with its use. It is the
transmitted light using either a hemispherical optical measur-
responsibility of the user of this standard to establish appro-
ing system, such as an integrating sphere, or a bidirectional
priate safety and health practices and determine the applica-
optical measuring system, such as annular, circumferential, or
bility of regulatory limitations prior to use.
uniplanar 45:0 and 0:45 geometry.
1.3 Because of the limited absolute accuracy of tristimulus
2. Referenced Documents
colorimeters, this test method specifies that, when color coor-
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2.1 ASTM Standards:
dinates are required, the instrument be standardized by use of
D2244 Practice for Calculation of Color Tolerances and
a standard having similar spectral (color) and geometric
Color Differences from Instrumentally Measured Color
characteristics to those of the specimen. This standard is also
Coordinates
known as a product standard. The use of a product standard of
E179 Guide for Selection of Geometric Conditions for
suitable stability is highly desirable.
Measurement of Reflection and Transmission Properties of
1.4 Because tristimulus colorimeters do not provide any
Materials
informationaboutthereflectanceortransmittancecurvesofthe
E284 Terminology of Appearance
specimens, they cannot be used to gain any information about
E805 Practice for Identification of Instrumental Methods of
metamerism or paramerism.
Color or Color-Difference Measurement of Materials
1.5 Because of the inability of tristimulus (filter) colorim-
E1164 Practice for Obtaining Spectrometric Data for
eters to detect metamerism or paramerism of specimens, this
Object-Color Evaluation
test method specifies that, when color differences are required,
E1345 Practice for Reducing the Effect of Variability of
the two specimens must have similar spectral (color) and
Color Measurement by Use of Multiple Measurements
geometric characteristics. In this case, the instrument may be
standardized for reflectance measurement by use of a white
3. Terminology
reflectance standard or, for transmittance measurement, with
3.1 Definitions:
no specimen or standard at the specimen position.
3.1.1 The definitions contained in Guide E179 and Termi-
1.6 This test method is generally suitable for any non-
nology E284 are applicable to this test method.
fluorescent, planar, object-color specimens of all gloss levels.
Users must determine whether an instrument complying with
4. Summary of Test Method
this method yields results that are useful to evaluate and
4.1 This test method provides procedures for measuring
characterize retroreflective specimens, or specimens having
object-color specimens in either transmission or reflection with
optical structures.
atristimuluscolorimeter(hereafterreferredtoasacolorimeter)
by use of the following geometric conditions and standardiza-
tion procedures:
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This test method is under the jurisdiction of ASTM Committee E12 on Color
and Appearance and is the direct responsibility of Subcommittee E12.02 on
2
Spectrophotometry and Colorimetry. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2006. Published January 2007. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1990. Last previous edition approved in 2006 as E1347 – 03. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E1347-06. the ASTM website.
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